1 /* 2 * Information interface for ALSA driver 3 * Copyright (c) by Jaroslav Kysela <perex@perex.cz> 4 * 5 * 6 * This program is free software; you can redistribute it and/or modify 7 * it under the terms of the GNU General Public License as published by 8 * the Free Software Foundation; either version 2 of the License, or 9 * (at your option) any later version. 10 * 11 * This program is distributed in the hope that it will be useful, 12 * but WITHOUT ANY WARRANTY; without even the implied warranty of 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 * GNU General Public License for more details. 15 * 16 * You should have received a copy of the GNU General Public License 17 * along with this program; if not, write to the Free Software 18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 19 * 20 */ 21 22 #include <linux/slab.h> 23 #include <linux/time.h> 24 #include <linux/string.h> 25 #include <sound/core.h> 26 #include <sound/minors.h> 27 #include <sound/info.h> 28 #include <sound/version.h> 29 #include <linux/utsname.h> 30 #include <linux/mutex.h> 31 32 #if defined(CONFIG_SND_OSSEMUL) && defined(CONFIG_PROC_FS) 33 34 /* 35 * OSS compatible part 36 */ 37 38 static DEFINE_MUTEX(strings); 39 static char *snd_sndstat_strings[SNDRV_CARDS][SNDRV_OSS_INFO_DEV_COUNT]; 40 static struct snd_info_entry *snd_sndstat_proc_entry; 41 42 int snd_oss_info_register(int dev, int num, char *string) 43 { 44 char *x; 45 46 snd_assert(dev >= 0 && dev < SNDRV_OSS_INFO_DEV_COUNT, return -ENXIO); 47 snd_assert(num >= 0 && num < SNDRV_CARDS, return -ENXIO); 48 mutex_lock(&strings); 49 if (string == NULL) { 50 if ((x = snd_sndstat_strings[num][dev]) != NULL) { 51 kfree(x); 52 x = NULL; 53 } 54 } else { 55 x = kstrdup(string, GFP_KERNEL); 56 if (x == NULL) { 57 mutex_unlock(&strings); 58 return -ENOMEM; 59 } 60 } 61 snd_sndstat_strings[num][dev] = x; 62 mutex_unlock(&strings); 63 return 0; 64 } 65 66 EXPORT_SYMBOL(snd_oss_info_register); 67 68 static int snd_sndstat_show_strings(struct snd_info_buffer *buf, char *id, int dev) 69 { 70 int idx, ok = -1; 71 char *str; 72 73 snd_iprintf(buf, "\n%s:", id); 74 mutex_lock(&strings); 75 for (idx = 0; idx < SNDRV_CARDS; idx++) { 76 str = snd_sndstat_strings[idx][dev]; 77 if (str) { 78 if (ok < 0) { 79 snd_iprintf(buf, "\n"); 80 ok++; 81 } 82 snd_iprintf(buf, "%i: %s\n", idx, str); 83 } 84 } 85 mutex_unlock(&strings); 86 if (ok < 0) 87 snd_iprintf(buf, " NOT ENABLED IN CONFIG\n"); 88 return ok; 89 } 90 91 static void snd_sndstat_proc_read(struct snd_info_entry *entry, 92 struct snd_info_buffer *buffer) 93 { 94 snd_iprintf(buffer, "Sound Driver:3.8.1a-980706 (ALSA v" CONFIG_SND_VERSION " emulation code)\n"); 95 snd_iprintf(buffer, "Kernel: %s %s %s %s %s\n", 96 init_utsname()->sysname, 97 init_utsname()->nodename, 98 init_utsname()->release, 99 init_utsname()->version, 100 init_utsname()->machine); 101 snd_iprintf(buffer, "Config options: 0\n"); 102 snd_iprintf(buffer, "\nInstalled drivers: \n"); 103 snd_iprintf(buffer, "Type 10: ALSA emulation\n"); 104 snd_iprintf(buffer, "\nCard config: \n"); 105 snd_card_info_read_oss(buffer); 106 snd_sndstat_show_strings(buffer, "Audio devices", SNDRV_OSS_INFO_DEV_AUDIO); 107 snd_sndstat_show_strings(buffer, "Synth devices", SNDRV_OSS_INFO_DEV_SYNTH); 108 snd_sndstat_show_strings(buffer, "Midi devices", SNDRV_OSS_INFO_DEV_MIDI); 109 snd_sndstat_show_strings(buffer, "Timers", SNDRV_OSS_INFO_DEV_TIMERS); 110 snd_sndstat_show_strings(buffer, "Mixers", SNDRV_OSS_INFO_DEV_MIXERS); 111 } 112 113 int snd_info_minor_register(void) 114 { 115 struct snd_info_entry *entry; 116 117 memset(snd_sndstat_strings, 0, sizeof(snd_sndstat_strings)); 118 if ((entry = snd_info_create_module_entry(THIS_MODULE, "sndstat", snd_oss_root)) != NULL) { 119 entry->c.text.read = snd_sndstat_proc_read; 120 if (snd_info_register(entry) < 0) { 121 snd_info_free_entry(entry); 122 entry = NULL; 123 } 124 } 125 snd_sndstat_proc_entry = entry; 126 return 0; 127 } 128 129 int snd_info_minor_unregister(void) 130 { 131 snd_info_free_entry(snd_sndstat_proc_entry); 132 snd_sndstat_proc_entry = NULL; 133 return 0; 134 } 135 136 #endif /* CONFIG_SND_OSSEMUL */ 137